The relationship between phase composition of TiO2 and its photocatalytic activity is as following: Mixed crystallite (anatase+brookite) > Mixed crystallite (anatase+rutile) > Anatase > Rutile.

• 本文得到的TiO2相组成与其光催化活性的关系为：混晶(锐钛矿+板钛矿)>混晶(锐钛矿+金红石)>锐钛矿>金红石。